trigonometric expansion
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21: 18.29 Asymptotic Approximations for -Hahn and Askey–Wilson Classes
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►Ismail (1986) gives asymptotic expansions as , with and other parameters fixed, for continuous -ultraspherical, big and little -Jacobi, and Askey–Wilson polynomials.
These asymptotic expansions are in fact convergent expansions.
For Askey–Wilson the leading term is given by
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►For a uniform asymptotic expansion of the Stieltjes–Wigert polynomials, see Wang and Wong (2006).
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22: Bibliography S
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Very high accuracy Chebyshev expansions for the basic trigonometric functions.
Math. Comp. 34 (149), pp. 237–244.
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Error bounds for a uniform asymptotic expansion of the Legendre function
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Quart. Appl. Math. 46 (3), pp. 473–488.
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23: 11.10 Anger–Weber Functions
24: 7.13 Zeros
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►As the and corresponding to the zeros of satisfy
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►For an asymptotic expansion of the zeros of (
) see Tuẑilin (1971).
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25: 20.2 Definitions and Periodic Properties
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20.2.1
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20.2.2
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20.2.3
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►Corresponding expansions for , , can be found by differentiating (20.2.1)–(20.2.4) with respect to .
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►For fixed , each of , , , and is an analytic function of for , with a natural boundary , and correspondingly, an analytic function of for with a natural boundary .
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26: 28.25 Asymptotic Expansions for Large
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28.25.1
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27: 10.67 Asymptotic Expansions for Large Argument
28: 28.6 Expansions for Small
29: 6.18 Methods of Computation
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►Power series, asymptotic expansions, and quadrature can also be used to compute the functions and .
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►Zeros of and can be computed to high precision by Newton’s rule (§3.8(ii)), using values supplied by the asymptotic expansion (6.13.2) as initial approximations.
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30: 18.15 Asymptotic Approximations
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►Asymptotic expansions for can be obtained from the results given in §18.15(i) by setting and referring to (18.7.1).
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►For asymptotic expansions of and that are uniformly valid when and see §14.15(iii) with and .
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